3차원 축대칭 캐비테이터의 초월공동유동 수치해석
A Numerical Analysis of the Supercavitating Flow around Three-Dimensional Axisymmetric Cavitators
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초록
Recently submerged objects moving at high speed such as a supercavitating torpedo have been studied for their practical advantage of the dramatic drag reduction. In this study, we are focusing our attention on supercavitating flows around axisymmetric cavitators; a numerical method based on inviscid flow is developed and predicted supercavities around several shapes of 2D and 3D cavitators are presented. The results are validated by comparison of existing theoretical and empirical results. In addition, characteristic features of supercavity shapes and drag forces acting on a real scale torpedo are evaluated according to practically appropriate operating conditions.
Abstract
Recently submerged objects moving at high speed such as a supercavitating torpedo have been studied for their practical advantage of the dramatic drag reduction. In this study, we are focusing our attention on supercavitating flows around axisymmetric cavitators; a numerical method based on inviscid flow is developed and predicted supercavities around several shapes of 2D and 3D cavitators are presented. The results are validated by comparison of existing theoretical and empirical results. In addition, characteristic features of supercavity shapes and drag forces acting on a real scale torpedo are evaluated according to practically appropriate operating conditions.
참고문헌 (7)
- 안병권, "Experimental investigation of supercavitating flows", International Journal of Naval Architecture and Ocean Engineering, 4(2), pp.123~131 (2012), 대한조선학회[DOI]
- Ahn, B.K., "Numerical analysis of axisymmetric supercavitating flows", 8th International Symposium on Cavitation (2012)
- Kim, Y.G., "Super-Cavitating Flow Problems about Two-Dimensional Symmetric Strut", Journal of the Society of Naval Architects of Korea, 27(4), pp.15~26 (1990)
- Knapp, R.T., "Cavitation. McGraw-Hill" (1979), McGraw-Hill
- Newman, J.N., "Marine Hydrodynamics" (1977), The MIT Press
- Plesset, M.S., "Cavity Drag in Two and Three Dimensions", Journal of Applied Physics, 19(10), pp.934~939 (1948)
- Steady-state Cavity Studies in a Free-jet Water Tunnel, Saint Anthony Falls St, "Self, M.", Anthony Falls Hydraulic Laboratory, 47~ (1955)